计算力学学报2024，Vol.41Issue(6)：1072-1080,9.DOI:10.7511/jslx20230612003
分布式电推进飞机复材机翼气动弹性分析及剪裁方法研究
Aeroelastic analysis and tailoring method study on composite wing of distributed electric propulsion aircraft
摘要
Abstract
Distributed electric propulsion aircraft usually adopt high-aspect-ratio composite wings,but with the increase of power,the aerodynamic interference of propeller slipstream effect on wings further aggravates the deformation of the wings,and it is difficult to accurately evaluate the aerodynamic performance of flexible wings using rigid wing models.In order to calculate the aerodynamic performance parameters of a DEP aircraft wing with high fidelity,based on CFD/CSD bidirectional fluid-structure interaction and propeller slipstream effect,the static aeroelastic calculation of X-57 isolated wing,wingtip propeller/wing coupling(cruise state)and distributed propeller/wing coupling(high lift state)is carried out respectively.The influence of aeroelastic deformation of a flexible wing on aerodynamic performance is analyzed at different angles of attack.At last,a BP neural network surrogate model based on nested genetic algorithm is introduced to optimize the ply angle of the wing skin.The results show that the propeller slipstream increases the pressure difference between the upper and lower surfaces of the wing,which increases the lift coefficient of the wing,and the increase of lift coefficient is more obvious at low Mach number and high angle of attack.The aerodynamic performance of the flexible wing is quite different from that of rigid wing.The propeller slipstream maximally increases the life coefficient of a rigid wing by 38.72％,and that of the flexible wing by 23.51％.The composite ply angle has a significant effect on the lift-drag ratio of the wing,and the lift-drag ratio can be improved by optimizing the ply angle to improve the longitudinal stiffness of the wing.A calculation method that takes into account timeliness and accuracy is provided for the aerodynamic performance evaluation and aeroelastic tailoring of the flexible wing of general propeller aircraft.关键词
分布式电推进/螺旋桨滑流/双向流固耦合/气动弹性剪裁/遗传算法/BP神经网络/代理模型Key words
distributed electric propulsion/propeller slipstream/bidirectional fluid-structure interaction/aeroelastic tailoring/genetic algorithm/BP neural network/surrogate model分类
航空航天引用本文复制引用
孙录斌,杨佑绪,张兴翠,吴逸飞,王斌..分布式电推进飞机复材机翼气动弹性分析及剪裁方法研究[J].计算力学学报,2024,41(6):1072-1080,9.基金项目
江西省"双千计划"人才项目(CK202006470)资助. （CK202006470）
